. >> did the government fail? >> martin smith: a number of people told us that you didn't make this a top priority. >> well, i'm sorry if they think that, because i made it an incredibly top priority. >> so you're telling me that not one executive on wall street committed provable fraud? i mean, i just don't believe that. >> tonight ofrontline, "the untouchables." >> frontlinis made possible by contributions to your pbs station from viewers like you. and by the corporation for public broadcasting. major support for frontline is provided by the john d. and catherine t. macarthur foundation, committed to building a more just, verdant and peaceful world. more information is available at macfound.org. additional funding is provided by the park foundation, dedicated to heightening public awareness of critical issues. and by the frontline journalism fund, supporting investigative reporting and enterprise journalism. >> although this downturn started in the housing sector and in the financial sector, you're seeing a lot